Buying and selling online is still one of the most lucrative way to make extra income on the internet. Today, I am going to show you some applications that can help you put up a buy and sell portal on your own Facebook account.

Whether you wish to sell or buy used or brand new items on the internet, these applications can do the work for you easily without leaving your profile page on Facebook. Ideal for already entrepreneur minded social networking fanatics.

1. Garage Sale - Garage Sale allows you to post personal items for sale directly on your Facebook profile page and buy items from your friends as well. Much like your own Facebook auction site.

Partnered with Buy.com, using Garage Sale is safe, secure and easy to use. You don’t need a complex credit card system - they will handle everything for you. Payments are sent to your Paypal account or you can request payment by check.

Using the application is free but there is a 5% commission that goes to Garage Sale for every successful transaction made. That’s it, no other extra fees required. If you don’t sell, you aren’t charged.

2. Shopit - This application allows you to do commerce with your own friends. Its a free Social Commerce Network that gives users the ability to buy, sell or trade products and services.

Shopit members can establish their own ecommerce presence using the customizable storefront, then mass syndicate their catalog to any website, blog and social network including Facebook using the store widget.

This Los Angeles based company was started on October of 2006.

3. My Merch Store - Powered by Zazzle.com, My Merch Store allows Facebook users to post products for sale on their profile page.

They also allow artists and designers to create products such as T-shirts, posters, cards, stamps, mugs, hats, and more on Zazzle and post them on sale across the web. Full ownership and copyright of the created product is awarded to the artist or designer.

To add the application on your Facebook profile page, just simply create your products on Zazzle.com and enter your Zazzle username on the “Settings” page within the application to be automatically displayed on your profile.

4. e3buy Auction - This application allows you to auction your used stuffs such as electronic gadgets and personal items on your Facebook profile.

Using the application is free and you don’t pay commission for every sale you make.

5. eBay Auctions - Ah yes! Who is not familiar with good old eBay? eBay Auctions allows you to add eBay Auction Listings to your Facebook profile.

Sell things to your Facebook friends, crafts, jewelry, diary pages, undies, dinner dates or just whatever you’re selling on eBay! Support a charity Auction by adding it to your Profile, or create a wishlist of Auctions you’d like to win! Plus, you can also view your friend’s auctions as well as comment on them.

With this application, you can also do the following:

a. Keep track of eBay auctions
b. Browse your friends’ auctions
c. Add auctions to your profile
d. Comment on auctions
e. Notify friends when you add/remove auctions
f. Share auctions with your friends
g. Search eBay

Note: Don’t forget to increase your network of friends to increase your market.